Open Source

This category is for operating systems (OSs) with two main traits, they: 1) Have a microkernel architecture. 2) Are open source. Other OSs go elsewhere. On this page, OSs are arranged in two groups and levels: 1) Top group: OSs for which there are more than one instance of an OS of this name/type, an OS family. 2) Bottom group: specific OSs, individual instances; there is only one OS of this name/type.

Apostle Free microkernel operating system for i386 architecture, built on Gemini Nucleus, coded in C. Seeks to provide well-designed alternate to extant OSs; goal: create an OS that works because it is appropriate and effective for its users. [open source, GPL]

Gemini Nucleus Open source project to make a production quality micro kernel based on the latest findings in OS research.

JTMOS Operating system aimed at OS developers and users who are very advanced at using computers generally; microkernel, multitasking, multithreaded, some garbage collection. [Open Source]